VisuaLink 128/384 Engineering GuideFactors of Disconnections
5: List of Factors for Disconnection in Table
Location of Factors for Disconnection |
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LU: Local User LN: Local Network TN: Transit Network RU: Remote User | RN: Remote Network | ||||
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Number | Message | Factors for Disconnection | Countermeasure (Example) | Location | |
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# 1 | Unassigned | Call cannot come in since it is | Check the remote number. | LN/RU | |
| number | currently a unassigned number. |
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# 2 | No route to | Specified transit network cannot be | Check the remote number. | TN/LN | |
| specified transit | recognized. |
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| network |
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# 3 | No route to | No route to remote site. | Check the remote number. | LN/RU | |
| destination |
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# 6 | Cancel | A channel cannot be accepted in a | After a while, retry connection. | LN | |
| unacceptable | network. |
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# 7 | Remote is busy | Connected channel is used. | After a while, retry connection. | LN | |
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# 16 | Normal is busy | A restoration of a disconnection of a | Try again |
| RU |
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| call is requested. |
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# 17 | User busy | It is currently in a communication | After a while, make a | RU/RN | |
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| with others. | connection again. |
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# 18 | No user response | No response | Check status of remote unit. | RN | |
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# 19 | User alerting, no | No response after a call message is | Check status of remote unit. | RN | |
| answer | received. |
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# 21 | Call rejected | Communication is rejected. | Check status of remote unit. | RU | |
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# 22 | Number changed | Remote terminal number has been | Check remote number, make | LN/RU | |
| changed. | another connection. |
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# 26 | No incoming bell | After a while, retry. |
| LN | |
| clearing |
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# 27 | Destination out of | Remote terminal is OFF | Check status of remote unit. | RU | |
| order |
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# 28 | Invalid number | Invalid format or incomplete | Check remote number and | LN/RU/ | |
| format (address | number. | retry. |
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| incomplete) |
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# 29 | Facility rejected | Requested facility is not allowed. | Check remote number. | LN/RU/ | |
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| RN |
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# 30 | Response to | Inquiry for status was received. | Check remote number and | LU/LN | |
| STATus ENquiry |
| retry. |
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# 31 | Normal, | Normal status was reported. | After a while, retry. |
| RN |
| unspecified |
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# 34 | Circuit/channel | No line or channel is available. | Check communication status. | LN/RN/TN | |
| congestion |
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# 38 | Line failure | Network is not functioning normally. | After a while, retry. |
| LU/LN/RU |
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# 41 | Temporary failure | Network is temporarily not available. | After a while, retry. |
| RN |
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# 42 | Switching | Switch is busy. | After a while, retry. |
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| equipment |
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| congestion |
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# 43 | Access information | Requested information element | After a while, retry. |
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| discarded | cannot be transmitted to a remote. |
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# 44 | Requested channel | Reported line or channel cannot be | After a while, retry. |
| LN/RU |
| not available | provided. |
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# 47 | Resource | Report status that other network is | Contact a retailer or a service |
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| unavailable, | busy. | center. |
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| unspecified |
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# 49 | This service is | QOS cannot be provided. |
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| RU/RN/ |
| currently not |
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| LN |
| available |
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